Melting furnace



` W. A. YUNG MELTING FURNAGE Nv. 1o' 1925.

Filed April 15. 1925 2 Sheets-Sheet l Ngv. 1o, 1925. 1.561.393

`W. A. YUNG MELTING 'FURNACE Filed April 15, 1925 2 Sheets-Sheet .2A

v stock in the furnace, thereby improving the Patented Nov. 10, 1925.

` UNITED STATES 'WILLIAM A. YUNG,I 0F PITTSBURGH, PENNSYLVANIA.

1,561,393 PATENT OFFICE.

MELTING FURNACE Application led April 1:5, 1925. Serial No. 23,289.

To all whom it may concern.'

Be it known that I, WILLIAM A. YUNG, a

citizen of the Unite-d States, and resident of..

Pittsburgh, inthe county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Melting Furnaces, of which the following isa specification.

This invention relates to melting furnaces and while not limited thereto, relates more particularly to glass melting furnaces, and has for one of its objects the provision of such a furnace so designed as to materially reduce the radiating surface of the molten mass, and also designed so as to utilize the maximum number of heatunits from the fuel used to melt the material.

Another object is to provide a furnace of'v l vthis class in which the refine-d molten mass Aso.

communicating with the initial melting ingsof glass is separated from the partly melted quality of furnace.

vA further object is to provide afurnace having the novel design, construction and combination of parts hereinafter described and illustrated in the accompanying drawglass tobe discharged from the Figure 1 is a sectional plan of a furnace constructed in accordance with my invention.

Figure E2 is a transverse sectional elevation through the furnace.

Figure 8 is a partial longitudinal sectional elevation on the line III- III of Figure 1.

nace into two separate chambers A-and B. All the walls of the furnace are formed from brick or other suitable refractory material, and the side and end walls are support-k ed by suitable buclrstays 10.

. The front end wall 6 of the furnace is provided with a fuel burner port opening 11 chamber A of the furnace, and having a burner 11a mountd therein of any standard construction adapted ,to burn either gaseous or liquid fuel. An outlet port opening 12 is also .provided in the' front end wall 6 and communicates with the forward portion of the chamber B.' The port 12 -opens into a flue 12 which leads to ra stack (not shown) or to a suitable recuperating chamber, and then to a stack if desired.

The side wall 5 of the furnace is provided with a suitable inlet opening 14 which opens into a suitable stock cham er 15` generally termed a dog-house,into which the stock and broken glass is fed and from which lit' feeds through the'opening 14 into the chamber. A of the furnace.

The side wall 4 of the furnace is provided I .adjacent its forward end with a pair of work (penings 16, through which the molten re ned discharged.

The dividing wall 9 extends they full length of the furnace and from the bottom glass is *gatheredor otherwise wall 3 to the roof, so as to completely vseparate the interior of the furnace into the chambersA and B, and such wall is provided` at-.its rear end with a small ,port opening 17 at its lower edge through which the molten glass may flow from the chamber A to the chamber B. A materially larger port opening 18 is provided at the rear end of the wall 9 at a point above the port 17 through which the products of combustion pass from the chamber A to the chamber B. The side walls 4 and 5 are offset out;n

wardly as at 19, and the dividing wall 9 is composed of a lower portion 9zt of materially greater thickness than the upper portion 9b, so as to form a relatively narrow flow path along the bottoni of the furnace for the molten glass, and a relatively wider flow pathabove the molten glass for the products of combustion.

The lower portion 9a of` the wall 9 pro* vided with anair duct 2O to permit a iow A of 'air through the interior of the wall tov cool the same.

During the operation of the furnace .if it is desired to vary the area of the port 18 so combustion, bricks may be lai inserted by the use of tongs or other suitfable tools through the work openings 16,

as to -regulate the flow of the roducts of alon the lower edge of the port 18, such bricks eing In operation, the broken glass and other stock is shoveled'or otherwise fed into the f dog-house 15 and falls by gravity or is otherwise fed into the "initial melting chamber A of the furnace. The material is meltedin the chamber A and forms a fluid mass will flow along the bottom of the furnacev from the front to the back and then through v the small port opening 17 into the chamber units from the gases.

j materials.

B, where its direction of iow will-.be reversed, and it will flow forward in the Vchamber B to the forward end of the furnace where it will be removed or discharged through the work openings 16.

The products of combustion from the furnace will pass from the forward end of the chamber A, rearwardly over the .m'ass of molten glass, through the port openlng 18 at the rear end of the wall 9, and then forward-ly over the lmass of molten glass in the chamber B to the port or opening 12 in the front wall (3 of the furnace, and thence to the stack.

The confiningl of the glass to a narrow flow path as it passes through the furnace materially reduces the radiating sui'face of the mass and, therefore, materially reduces the amount of heat necessary tov melt a given quantity of glass over that necessary in previous furnaceconstructions, and the confining of the gases or products of combustion to a flow path over the entire mass of glass and compelling such gases to 'flow along the entire length of both the chambers A and B, extracts the maximum heat Therefore, materially less fuel isnecessary to melt a given vquantity of glass in a furnace constructed in accordance with this invention than with any furnaces now in use.

It will also be noted that. due to the fact that all the glass must travel through the same path and be subjected to the melting pertaining primarily to a glass melting furnace, it will be understood that I do not wish to limit vmyself to this use exclusively, since the same construction may be used for furnaces used in melting metals and other The outlet for the products of combustion may be located in the vioofor side walls adjacent to the end wall 7 instead of in the end wall as shown, and other changes may be made within the scope of my invention as dened inthe appended claims.

1. A melting furnace comprising a` substantially rectangular body portion, a wall dividing said furnace into two melting chambers, and having separate openings at one end for the passage of the melted material and products of combustion from one chamber to the other, a fuel burner at the end of one of said chambers opposite said openings in said dividing Wall, an outlet port for the products of combustion at the end of said other chamber opposite said openings in said dividing wall, and work openings for the removal of the melted material in said4 last' named chamber.

` 2. A glass melting furnace ,comprising a rectangular body portion comprising a bottom wall, side walls, front and back end Walls, roof, and a longitudinally extending dividing wall extending from bottom to roof and end to cud of the furnace forming two chambers, a pair of port openings adjacent the reai' end of said dividing wall for the passage of the molten glass and products of combustion from one chamber to the other, a burner port in the front end wall of one of said chambers, a glass stock inlet port adjacent the forward end of said last named chamber, an outlet port for the products of combustion at the forward end of the other of said chambers, and work openings for the discharge of the glass adjacent the forward end of said last named chamber.

3. A melting furnace comprising a rectangular body portion composed of a substantially flat bottom wall, side walls, front and back end walls, arched roof, and ya longitudinally vextending dividing wall ex tending from bottom to roof and end to end o f the furnace forming two chambers, said side walls being offset outwardly intermediatetheir upper and lower edges and said dividing wall being materially thicker from its bottom upwardly to a point intermediate the bottom and roof of said furnace to thereby form relativel narrow flow channels for the molten material and relatively wide flow channels for the products of'combustion above the molten material, a burner port and an outlet port for the products of combustion formed. in said furnace, and said dividing wall being provided with openings for the passage of molten material and the products of combustion from one chamber to the other.'

4. A melting furnace comprising a rec tangular body portion composed of a substantially flat bottom wall, side walls, front and back end walls, arched roof, and a longitudinally extending dividing wall extending from bottom to roof and end to end of the furnace` forming two chambers, said side walls being oifset outwardly intermediate v their upper and lowervedges and said dividabove the molten material, a buiner port adjacent the forward end of one of said chambers, an outlet port adjacent the forward end of the other chamber, openings adjacent the rear end of said dividing wall to permit the molten material and products of combustion to flow from one chamber into the other, and suitable work openings through which the molten material is discharged.

5. A glass melting furnace comprising a rectangular body portion composedof a substantially flat bottom wall, side walls, front and back end walls, arched roof, and a longitudinally extending dividing wall extending from bottom to roof and end to end of the furnace forming two chambers, said side walls being offset outwardly intermediate their upper and lower edges and said dividing wall being materiallj7 thicker from its bottom upwardly to a point intermediate the bottom and roof of said furnace to thereby form rjelatively narrow How channels for the molten glass and relatively wider flow paths for the products of combustion above the molten glass, an inlet or feed opening for the glass stock in one of said chambers adjacent the front end of said furnace, a fuel burner enteringr said last named chamber at the front end thereof, an outlet opening for the products of combustion in the front end wall of the other of said chambers, work openings adjacent the forward end of said last named chamber, a port in the lower portion of said dividing wall for passage of the molten glass from one of said chambers to the other, and a second and materially larger port located in the uppei part of said di'viding wall for the passage of the products of combustion from one chamber to the other, said ports being located adjacent the rear end of said dividing wall, so that the glass and products of combustion must travel from the front end of one chamber to the rear, then into the rear of the second bottom wall, side Walls, front and back end walls and roof, a dividing wall extending longitudinally of said furnace from end ti; end and bottom to roof forming two chambers, openings through said dividin wall adjacent one end for the passage o glass and the products of combustion from one chamber to the other, said side walls being offset outwardly intermediate their upper and lower edges and said dividing wall being materially thicker from its bott-om upwardly to a point intermediate the bottom and roof of said furnace to thereby form relatively narrow flow paths for the molten glass and relatively wider flow paths for the products of combustion above the glass.

7. In a glass melting furnace comprising a rectangular body portion composed of a bottom wall, side walls, front and back end walls and roof, a dividing wall extending longitudinally of said furnace from end to end and bottom to roof forming two chambers, openings through said dividin wall adjacent one end for the passage of;r glass and the products of combustion from one chamber to the other, said side walls being offset outwardly intermediate their upper and lower edges and said dividing wall being materially thicker from its bottom upwardly to a point intermediate the bottom and roof of said furnace to thereby form relatively narrow low paths for the molten glass and relatively wider flow paths for the products of combustion above thev glass, and means for cooling the thicker portion of said dividing wall.

In testimony whereof, l have hereunto signed by naine. 

